/* roulang page: index */
:root {
      --bg-base: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-dark: #090A0F;
      --bg-card: #FFFFFF;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --brand-blue: #0284C7;
      --brand-blue-hover: #0369A1;
      --brand-cyan: #0D9488;
      --brand-amber: #D97706;
      --border-color: rgba(148, 163, 184, 0.25);
      --border-dark: rgba(255, 255, 255, 0.12);
      --card-radius: 8px;
      --btn-radius: 6px;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
      --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
      --max-w: 1280px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-body);
      line-height: 1.75;
      font-size: 15px;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    /* 顶部双行导航 */
    .top-utility-bar {
      background: #F1F5F9;
      border-bottom: 1px solid var(--border-color);
      font-size: 13px;
      color: var(--text-muted);
      padding: 6px 0;
    }

    .top-utility-inner {
      max-width: var(--max-w);
      margin: 0 auto;
      padding: 0 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .top-utility-inner span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .top-utility-links {
      display: flex;
      gap: 16px;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .header-inner {
      max-width: var(--max-w);
      margin: 0 auto;
      padding: 14px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.02em;
    }

    .brand-logo-mark {
      width: 28px;
      height: 28px;
      background: #0F172A;
      color: #FFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      font-weight: 800;
      border-radius: 4px;
      border-left: 3px solid var(--brand-blue);
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .main-nav a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-body);
      position: relative;
    }

    .main-nav a:hover,
    .main-nav a.active {
      color: var(--brand-blue);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--brand-blue);
      color: #FFF;
      font-weight: 600;
      font-size: 14px;
      padding: 10px 20px;
      border-radius: var(--btn-radius);
      border: 1px solid var(--brand-blue);
      cursor: pointer;
      transition: all 0.2s ease;
      min-height: 44px;
      min-width: 44px;
    }

    .btn-primary:hover {
      background: var(--brand-blue-hover);
      box-shadow: 0 4px 12px rgba(2, 132, 199, 0.25);
    }

    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #FFFFFF;
      color: var(--text-main);
      font-weight: 600;
      font-size: 14px;
      padding: 10px 20px;
      border-radius: var(--btn-radius);
      border: 1px solid rgba(148, 163, 184, 0.4);
      cursor: pointer;
      transition: all 0.2s ease;
      min-height: 44px;
      min-width: 44px;
    }

    .btn-secondary:hover {
      background: #F8FAFC;
      border-color: var(--text-main);
    }

    /* 容器与通用Section */
    .container {
      max-width: var(--max-w);
      margin: 0 auto;
      padding: 0 24px;
    }

    .section-wrap {
      padding: 80px 0;
      position: relative;
    }

    .section-alt {
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .section-dark {
      background: var(--bg-dark);
      color: #E2E8F0;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .section-header {
      margin-bottom: 48px;
    }

    .section-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      color: var(--brand-blue);
      background: rgba(2, 132, 199, 0.08);
      padding: 4px 10px;
      border-radius: 4px;
      margin-bottom: 12px;
    }

    .section-tag-dark {
      color: #38BDF8;
      background: rgba(56, 189, 248, 0.12);
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.02em;
      line-height: 1.3;
      margin-bottom: 16px;
    }

    .section-dark .section-title {
      color: #FFFFFF;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 760px;
      line-height: 1.7;
    }

    .section-dark .section-subtitle {
      color: #94A3B8;
    }

    /* 板块 1: Hero 5:7 斜向错位 */
    .hero-section {
      padding: 70px 0 90px;
      background: radial-gradient(circle at top right, rgba(2, 132, 199, 0.06) 0%, transparent 60%), #F8FAFC;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 5fr 7fr;
      gap: 48px;
      align-items: center;
    }

    .hero-h1 {
      font-size: 44px;
      line-height: 1.18;
      font-weight: 900;
      color: var(--text-main);
      letter-spacing: -0.03em;
      margin-bottom: 20px;
    }

    .hero-desc {
      font-size: 16px;
      color: var(--text-body);
      line-height: 1.8;
      margin-bottom: 32px;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 40px;
    }

    .hero-kpi-bar {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      padding-top: 24px;
      border-top: 1px solid var(--border-color);
    }

    .hero-kpi-item h4 {
      font-size: 24px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .hero-kpi-item p {
      font-size: 13px;
      color: var(--text-muted);
    }

    .hero-visual-frame {
      position: relative;
      border-radius: var(--card-radius);
      overflow: hidden;
      box-shadow: 0 20px 40px -15px rgba(15, 23, 42, 0.15);
      border: 1px solid var(--border-color);
      transform: perspective(1000px) rotateY(-3deg) rotateX(2deg);
      transition: transform 0.4s ease;
    }

    .hero-visual-frame:hover {
      transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
    }

    .hero-visual-overlay {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: linear-gradient(180deg, transparent 0%, rgba(9, 10, 15, 0.88) 100%);
      padding: 24px;
      color: #FFF;
    }

    .hero-visual-badge {
      display: inline-block;
      background: var(--brand-cyan);
      color: #FFF;
      font-size: 12px;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 4px;
      margin-bottom: 6px;
    }

    /* 板块 2: 架构白皮书图文 */
    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .arch-specs-list {
      list-style: none;
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .arch-spec-item {
      padding: 16px 20px;
      background: var(--bg-base);
      border-left: 4px solid var(--brand-blue);
      border-radius: 0 var(--card-radius) var(--card-radius) 0;
      border-top: 1px solid var(--border-color);
      border-right: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .arch-spec-item h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .arch-spec-item p {
      font-size: 13.5px;
      color: var(--text-body);
    }

    /* 板块 3: 核心优势 6 卡片网格 */
    .grid-3x2 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .adv-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .adv-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(2, 132, 199, 0.4);
    }

    .adv-code-num {
      font-family: monospace;
      font-size: 12px;
      font-weight: 700;
      color: var(--brand-blue);
      background: rgba(2, 132, 199, 0.08);
      padding: 2px 6px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 16px;
      align-self: flex-start;
    }

    .adv-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .adv-card p {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.65;
    }

    /* 板块 4: 旗舰产品 3大卡片规格表 */
    .grid-3-col {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .prod-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .prod-header {
      padding: 24px;
      border-bottom: 1px solid var(--border-color);
      background: #FAFAFC;
    }

    .prod-model {
      font-size: 22px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.01em;
    }

    .prod-target {
      font-size: 13px;
      color: var(--brand-blue);
      font-weight: 600;
      margin-top: 4px;
    }

    .prod-body {
      padding: 24px;
      flex: 1;
    }

    .prod-desc {
      font-size: 14px;
      color: var(--text-body);
      margin-bottom: 20px;
      line-height: 1.65;
    }

    .spec-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 13px;
      margin-bottom: 20px;
    }

    .spec-table td {
      padding: 8px 0;
      border-bottom: 1px dashed var(--border-color);
    }

    .spec-table td:first-child {
      color: var(--text-muted);
      width: 40%;
    }

    .spec-table td:last-child {
      color: var(--text-main);
      font-weight: 600;
      text-align: right;
    }

    .prod-footer {
      padding: 16px 24px;
      background: #F8FAFC;
      border-top: 1px solid var(--border-color);
    }

    /* 板块 5: 软件工具链 */
    .toolchain-grid {
      display: grid;
      grid-template-columns: 5fr 7fr;
      gap: 36px;
      align-items: center;
    }

    .code-console {
      background: #090A0F;
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--card-radius);
      padding: 20px 24px;
      font-family: Consolas, Monaco, "Courier New", Courier, monospace;
      font-size: 13px;
      color: #94A3B8;
      box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
    }

    .console-bar {
      display: flex;
      gap: 6px;
      margin-bottom: 16px;
      padding-bottom: 12px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .console-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #475569;
    }

    .console-line {
      margin-bottom: 8px;
      line-height: 1.5;
    }

    .code-hl-green {
      color: #10B981;
    }

    .code-hl-blue {
      color: #38BDF8;
    }

    .code-hl-amber {
      color: #F59E0B;
    }

    /* 板块 6: 落地场景图文交替 */
    .scenario-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
      margin-bottom: 56px;
    }

    .scenario-row:last-child {
      margin-bottom: 0;
    }

    .scenario-row.reverse {
      direction: rtl;
    }

    .scenario-row.reverse > * {
      direction: ltr;
    }

    .scenario-img-box {
      border-radius: var(--card-radius);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    /* 板块 7: 能效对比表格 */
    .bench-table-wrap {
      overflow-x: auto;
      margin-top: 32px;
    }

    .bench-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    .bench-table th {
      padding: 16px 20px;
      background: #1E2229;
      color: #F8FAFC;
      font-size: 14px;
      font-weight: 700;
      border-bottom: 2px solid var(--border-dark);
    }

    .bench-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-dark);
      font-size: 14px;
      color: #CBD5E1;
    }

    .bench-table tr.highlight td {
      background: rgba(2, 132, 199, 0.12);
      color: #FFF;
      font-weight: 600;
    }

    .badge-win {
      display: inline-block;
      font-size: 11px;
      background: var(--brand-cyan);
      color: #FFF;
      padding: 2px 6px;
      border-radius: 4px;
      margin-left: 6px;
    }

    /* 板块 8: 客户落地案例 */
    .grid-2-col {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }

    .case-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .case-badge {
      font-size: 12px;
      font-weight: 700;
      color: var(--brand-cyan);
      margin-bottom: 8px;
    }

    .case-card h3 {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .case-card p {
      font-size: 14.5px;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 20px;
    }

    .case-metric {
      display: flex;
      gap: 24px;
      padding-top: 16px;
      border-top: 1px solid var(--border-color);
    }

    .case-metric-item h5 {
      font-size: 20px;
      font-weight: 800;
      color: var(--brand-blue);
    }

    .case-metric-item span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 板块 9: 关键基准指标条 */
    .metric-bar {
      background: #111827;
      color: #FFF;
      padding: 48px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .metric-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }

    .metric-box h3 {
      font-size: 38px;
      font-weight: 900;
      color: #38BDF8;
      letter-spacing: -0.02em;
      margin-bottom: 6px;
    }

    .metric-box p {
      font-size: 13.5px;
      color: #94A3B8;
    }

    /* 板块 10: 客户评价与背书 */
    .quote-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 28px;
      position: relative;
    }

    .quote-text {
      font-size: 14.5px;
      color: var(--text-body);
      line-height: 1.75;
      margin-bottom: 20px;
      font-style: italic;
    }

    .quote-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .quote-avatar {
      width: 42px;
      height: 42px;
      background: #E2E8F0;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--brand-blue);
    }

    .quote-meta h4 {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }

    .quote-meta p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 板块 11: 资讯摘要 */
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .news-content {
      padding: 24px;
      flex: 1;
    }

    .news-date {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 8px;
    }

    .news-content h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .news-content p {
      font-size: 13.5px;
      color: var(--text-body);
      line-height: 1.6;
    }

    /* 板块 12: 技术 FAQ */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 20px 24px;
      cursor: pointer;
      transition: border-color 0.2s ease;
    }

    .faq-item:hover {
      border-color: var(--brand-blue);
    }

    .faq-q {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-q::after {
      content: '+';
      font-size: 20px;
      font-weight: 400;
      color: var(--text-muted);
    }

    .faq-item.active .faq-q::after {
      content: '−';
    }

    .faq-a {
      font-size: 14.5px;
      color: var(--text-body);
      line-height: 1.7;
      margin-top: 14px;
      padding-top: 14px;
      border-top: 1px solid var(--border-color);
      display: none;
    }

    .faq-item.active .faq-a {
      display: block;
    }

    /* 板块 13: 样片申请与全周期保障 */
    .cta-assurance-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .assurance-cards {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .assure-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 20px;
    }

    .assure-item h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .assure-item p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    .sample-form-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 10px 14px;
      font-size: 14px;
      border: 1px solid rgba(148, 163, 184, 0.4);
      border-radius: var(--btn-radius);
      outline: none;
      background: #FAFAFC;
      transition: border-color 0.2s ease;
      font-family: inherit;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--brand-blue);
      background: #FFFFFF;
    }

    /* 底部固定条 */
    .floating-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background: rgba(9, 10, 15, 0.95);
      backdrop-filter: blur(8px);
      border-top: 1px solid rgba(255, 255, 255, 0.12);
      color: #FFF;
      padding: 12px 24px;
      z-index: 99;
      transform: translateY(100%);
      transition: transform 0.3s ease;
    }

    .floating-bar.show {
      transform: translateY(0);
    }

    .floating-inner {
      max-width: var(--max-w);
      margin: 0 auto;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
    }

    .floating-info {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .floating-chip-name {
      font-size: 14px;
      font-weight: 700;
      color: #38BDF8;
    }

    .floating-chip-desc {
      font-size: 13px;
      color: #94A3B8;
    }

    /* 页脚 */
    .site-footer {
      background: #090A0F;
      color: #94A3B8;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding: 60px 0 32px;
      font-size: 13.5px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 48px;
    }

    .footer-logo {
      font-size: 18px;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 12px;
    }

    .footer-col h4 {
      font-size: 14px;
      font-weight: 700;
      color: #F8FAFC;
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a:hover {
      color: #38BDF8;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 12px;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid,
      .arch-grid,
      .toolchain-grid,
      .scenario-row,
      .cta-assurance-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .scenario-row.reverse {
        direction: ltr;
      }
      .grid-3x2,
      .grid-3-col {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-visual-frame {
        transform: none;
      }
    }

    @media (max-width: 768px) {
      .top-utility-bar {
        display: none;
      }
      .main-nav {
        display: none;
      }
      .grid-3x2,
      .grid-3-col,
      .grid-2-col,
      .assurance-cards {
        grid-template-columns: 1fr;
      }
      .metric-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-h1 {
        font-size: 32px;
      }
      .section-title {
        font-size: 26px;
      }
      .hero-kpi-bar {
        grid-template-columns: 1fr;
      }
      .floating-chip-desc {
        display: none;
      }
    }